[EN] PYRROLO[DÉRIVÉS DE PYRROLO[20091015WO2007140222A2NOVARTIS AG [CH], et al20071206513-311,18X1-14XWO03074530A1HOFFMANN LA ROCHE [CH]20030912387-151Y1-14YWO2005107760A1IRM LLC [US], et al20051117311Y1-14YUS7319102B1CLARK MICHAEL PHILIP [US], et al200801153396444930-36Y1-14YWO2007140222A2NOVARTIS AG [CH], et al20071206WO03074530A1HOFFMANN LA ROCHE [CH]20030912WO2005107760A1IRM LLC [US], et al20051117US7319102B1CLARK MICHAEL PHILIP [US], et al20080115 [FR] DÉRIVÉS DE PYRROLO[20091015WO2007140222A2NOVARTIS AG [CH], et al20071206513-311,18X1-14XWO03074530A1HOFFMANN LA ROCHE [CH]20030912387-151Y1-14YWO2005107760A1IRM LLC [US], et al20051117311Y1-14YUS7319102B1CLARK MICHAEL PHILIP [US], et al200801153396444930-36Y1-14YWO2007140222A2NOVARTIS AG [CH], et al20071206WO03074530A1HOFFMANN LA ROCHE [CH]20030912WO2005107760A1IRM LLC [US], et al20051117US7319102B1CLARK MICHAEL PHILIP [US], et al20080115
Synthesis of 1,3-Enynes by Iron-Catalyzed Propargylic C–H Functionalization: An Alkyne Analogue for the Eschenmoser Methenylation
作者:Shalini Dey、Aaron D. Charlack、Austin C. Durham、Jin Zhu、Yidong Wang、Yi-Ming Wang
DOI:10.1021/acs.orglett.4c00696
日期:2024.4.26
alkyl-substituted alkynes to 1,3-enynes is reported. In this α-methenylation process, an iron-catalyzed propargylic C–H functionalization delivers tetramethylpiperidine-derived homopropargylic amines which undergo facile Cope elimination upon N-oxidation to afford the enyne products. A range of aryl alkyl and dialkyl acetylenes were found to be suitable substrates for this process, which constitutes an alkyne analogue
Synthesis of Terminal Allenes through Copper-Mediated Cross-Coupling of Ethyne with<i>N</i>-Tosylhydrazones or α-Diazoesters
作者:Fei Ye、Chengpeng Wang、Xiaoshen Ma、Mohammad Lokman Hossain、Ying Xia、Yan Zhang、Jianbo Wang
DOI:10.1021/jo502316q
日期:2015.1.2
Ethyne is employed as coupling partner in copper-mediated cross-coupling reactions with N-tosylhydrazones and alpha-diazoacetate, leading to the development of a new synthetic method for terminal allenes. With this novel coupling method, the terminal allenes were obtained in good yields and with excellent functional group tolerance. Copper carbene migratory insertion is proposed as the key step in these transformations.